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Explain why a swing needle can float on the surface of water in a glass?
Wiki User
∙ 12y ago
Due to surface tension, the upper surface of water acts like a stretched membrane which enables it to float a swing needle.
Wiki User
∙ 12y ago
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Why can a sewing needle can float on the surface of water in glass?
Surface tension
Why can a sewing needle can float on the surface of water in a glass.?
Surface tension
Why can a sewing needle can float on the surface water in a glass?
Yes if the surface tension of the water is not broken. If you are careful you can place a needle on the surface of the water in a glass. Also if you reduce the surface tension with detergent (just a very little is enough) the needle will sink because it's density is greater than that of the water. NO (if the surface tension of the water is broken, a needle cannot float on the surface of water. This is because the needle has higher density than water (density is mass divided by volume).
How can a sewing needle float on the surface of water?
The needle does not break the surface tension (meniscus). Get a small piece of toilet tissue and lay it on a glass of water. lay a needle on the tissue. The tissue will become sodden and sink, leaving the needle floating on the surface tension. Put the smallest drop of washing-up liquid on the water. The surface tension will be destroyed and the needle will sink. Try it.
What is a general value for Surface Emissivity for 6mm float glass?
0.79
How can you make sand appear to float around in water?
This is a thin layer on the waters surface where all the water molecules try to crowd together. If something is light enough it will float on this layer if it doesn't break through the layer even though it is more dense than water. If you are careful you can do a neat trick. Get a glass of water (it has to be clean with no detergent left over from washing) and carefully place a needle on the surface and if you are very careful the needle will float on the surface. If you wipe it over with a magnet a few times before doing,XOXO, I HOPE THAT I SERV YOUYOUR WELCOME!!
What will happen to a needle if pinch of detergent is added to a water?
If you have floated a needle on the surface of the water in a glass then adding a little detergent will cause the needle to sink. This is because the presence of the detergent changes the surface tension of the water so that it can no longer support the needle.
Explain why bubbles are formed when the fizzy drink is poured into a glass?
CO2 gas is put into solution in a fizzy drink. When the drink is poured, some of the gas contained in solution starts to form bubbles on the surface of the glass. They attempt to hold on, but with the agitation pouring, many are knocked free instantly to float to the surface and pop.
What happened to the needle when you added 2-3 drops of the detergent solution?
If you have floated a needle on the surface of the water in a glass then adding a little detergent will cause the needle to sink. This is because the presence of the detergent changes the surface tension of the water so that it can no longer support the needle.
Where would you see surface tension in the world?
It is relatively easy to float a sewing needle on the surface of the water in a glass. The sewing needle is steel, and steel is more dense than water, and should sink. But by carefully placing the needle on the surface of the water (lengthwise), it is not that difficult to make the needle float. It floats due to the surface tension of the water. If you are in the mood to experiment, try a paper clip as well. Make sure there is a little space between the different lengths of the steel so that none of the lengths of the paper clip touch each other. A picture of a floating paper clip can be found in the Wikipedia post linked below. You up for the challenge? Water in a pond or a slow moving stream or river exhibits surface tension that supports a number of organisms (like the oarsman or water strider) that "walk on water" and could not survive without the surface tension of the water for support. Links below are worth the look.
If a raisin is dropped in a glass of champagne it will sink and settle down in the glass?
Yes, the raisin will sink into a glass of champagne, but not for long ... the bubbles from the champagne will inflate the dried raisin and it will float up to the surface.
Who invented float glass?
Float glass was first invented by a company in England called Pilkington Glass.
